Hertzsprung and Russell independently plot luminosity against temperature
Hertzsprung, working at Leiden, plotted luminosity against colour around 1911 and distinguished giants from dwarfs; Russell, unaware of that work, plotted absolute magnitude against spectral class in 1913. Both found that stars fall into distinct groups rather than scattering. Because Russell was the more prominent figure the plot was first called the Russell diagram, then the Russell-Hertzsprung diagram, and only later given the order that matches the chronology.
Historical — it happened, and the record is settled.
Subjects
- Hertzsprung-Russell diagram · model · not located
- Ejnar Hertzsprung · person · Denmark · not located
- Henry Norris Russell · person · United States · not located
- Main sequence (core hydrogen burning) · concept · not located
Evidence
Partly verified — Core facts are sourced; some optional detail is deliberately absent.
Senior Astrophysics: stellar evolution and the Hertzsprung-Russell diagram
Supports the description of the main sequence as a mass-ordered band and the 1911/1913 attribution and naming history of the Hertzsprung-Russell diagram. Institutional educational material, read via search summary rather than fetched; not a substitute for the original Hertzsprung and Russell publications.
CSIRO Australia Telescope National Facility · undated · Partly verified
atnf.csiro.au/resources/education/senior-astrophysics, pages on the main sequence and the Hertzsprung-Russell diagram
Recorded on Hertzsprung-Russell diagram
- Hertzsprung and Russell independently plot luminosity against temperature
- Payne concludes that stars are mostly hydrogen - and disclaims it
- Gaia stops observing
- Gaia Data Release 4 scheduled
Related
Related because they share a subject in the Atlas — never because the text looks similar.
- Gaia stops observing · 2025-01-15
- Gaia Data Release 4 scheduled · 2026-12 (planned)
- Payne concludes that stars are mostly hydrogen - and disclaims it · 1925